ubun2

I am getting the following error in Eclipse Galileo while launching GWT application in ubuntu
java.lang.UnsatisfiedLinkError: /home/raj/eclipse/plugins/com.google.gwt.eclipse.sdkbundle.linux_1.7.0.v200907131030/gwt-linux-1.7.0/mozilla-1.7.12/libxpcom.so: libstdc++.so.5: cannot open shared object file: No such file or directory    at java.lang.ClassLoader$NativeLibrary.load(Native Method)    at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1778)    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1674)    at java.lang.Runtime.load0(Runtime.java:770)    at java.lang.System.load(System.java:1003)    at com.google.gwt.dev.shell.moz.MozillaInstall.load(MozillaInstall.java:190)    at com.google.gwt.dev.BootStrapPlatform.initHostedMode(BootStrapPlatform.java:53)    at com.google.gwt.dev.HostedModeBase.<init>(HostedModeBase.java:362)    at com.google.gwt.dev.SwtHostedModeBase.<init>(SwtHostedModeBase.java:98)    at com.google.gwt.dev.HostedMode.<init>(HostedMode.java:271)    at com.google.gwt.dev.HostedMode.main(HostedMode.java:230)